Move json, uri, utf and crypto libraries into the VM.

sdk/lib/crypto/crypto.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library dart.crypto;
 
 import 'dart:math';
 
+part 'crypto_base.dart';
 part 'crypto_utils.dart';
 part 'hash_utils.dart';
 part 'hmac.dart';
 part 'md5.dart';
 part 'sha1.dart';
 part 'sha256.dart';
-
-/**
- * Interface for cryptographic hash functions.
- *
- * The [add] method is used to add data to the hash. The [close] method
- * is used to extract the message digest.
- *
- * Once the [close] method has been called no more data can be added using the
- * [add] method. If [add] is called after the first call to [close] a
- * HashException is thrown.
- *
- * If multiple instances of a given Hash is needed the [newInstance]
- * method can provide a new instance.
- */
-// TODO(floitsch): make Hash implement Sink, StreamSink or similar.
-abstract class Hash {
-  /**
-   * Add a list of bytes to the hash computation.
-   */
-  add(List<int> data);
-
-  /**
-   * Finish the hash computation and extract the message digest as
-   * a list of bytes.
-   */
-  List<int> close();
-
-  /**
-   * Returns a new instance of this hash function.
-   */
-  Hash newInstance();
-
-  /**
-   * Internal block size of the hash in bytes.
-   *
-   * This is exposed for use by the HMAC class which needs to know the
-   * block size for the [Hash] it is using.
-   */
-  int get blockSize;
-}
-
-/**
- * SHA1 hash function implementation.
- */
-abstract class SHA1 implements Hash {
-  factory SHA1() => new _SHA1();
-}
-
-/**
- * SHA256 hash function implementation.
- */
-abstract class SHA256 implements Hash {
-  factory SHA256() => new _SHA256();
-}
-
-/**
- * MD5 hash function implementation.
- *
- * WARNING: MD5 has known collisions and should only be used when
- * required for backwards compatibility.
- */
-abstract class MD5 implements Hash {
-  factory MD5() => new _MD5();
-}
-
-/**
- * Hash-based Message Authentication Code support.
- *
- * The [add] method is used to add data to the message. The [digest] and
- * [close] methods are used to extract the message authentication code.
- */
-// TODO(floitsch): make Hash implement Sink, StreamSink or similar.
-abstract class HMAC {
-  /**
-   * Create an [HMAC] object from a [Hash] and a key.
-   */
-  factory HMAC(Hash hash, List<int> key) => new _HMAC(hash, key);
-
-  /**
-   * Add a list of bytes to the message.
-   */
-  add(List<int> data);
-
-  /**
-   * Perform the actual computation and extract the message digest
-   * as a list of bytes.
-   */
-  List<int> close();
-
-  /**
-   * Extract the message digest as a list of bytes without closing [this].
-   */
-  List<int> get digest;
-
-  /**
-   * Verify that the HMAC computed for the data so far matches the
-   * given message digest.
-   *
-   * This method should be used instead of memcmp-style comparisons
-   * to avoid leaking information via timing.
-   *
-   * Throws an exception if the given digest does not have the same
-   * size as the digest computed by this HMAC instance.
-   */
-  bool verify(List<int> digest);
-}
-
-/**
- * Utility methods for working with message digests.
- */
-abstract class CryptoUtils {
-  /**
-   * Convert a list of bytes (for example a message digest) into a hex
-   * string.
-   */
-  static String bytesToHex(List<int> bytes) {
-    return _CryptoUtils.bytesToHex(bytes);
-  }
-
-  /**
-   * Converts a list of bytes (for example a message digest) into a
-   * base64 encoded string optionally broken up in to lines of
-   * [lineLength] chars separated by '\r\n'.
-   */
-  static String bytesToBase64(List<int> bytes, [int lineLength]) {
-    return _CryptoUtils.bytesToBase64(bytes, lineLength);
-  }
-}
-
-/**
- * HashExceptions are thrown on invalid use of a Hash
- * object.
- */
-class HashException {
-  HashException(String this.message);
-  toString() => "HashException: $message";
-  String message;
-}
-